They are also pretty good at integration (e.g. iOS with MaccOS) and at UI. Look at UI scaling on high dpi screens in Windows/linux and compare it to OS X.

Also of course the fact that OS X gets you both big commercial software for e.g. media creation and a unix-y machine.

So I wouldn't explain it with hardware alone, I think others have cought up pretty well compared to say 10 years ago.